My daughter is really small! She still wears 3-6 month clothes! She is interested in the potty, she has a potty seat and she will pee on the potty when we put her on it. I think that soon we will be fully potty training, not just half time! So she will need small undies. Where can I get some super small ones? All I can find in the stores are way too big for her. Any reccomendations would be great!